Missing 'are' in search-form (#3987)

Co-authored-by: Phillip Carter <pcarter@fastmail.com>

Author: rockdaboot

layouts/shortcodes/ecosystem/registry/search-form.html

@@ -37,7 +37,7 @@
 <div class="alert alert-info">
 The OpenTelemetry Registry allows you to search for instrumentation libraries,
 collector components, utilities, and other useful projects in the OpenTelemetry
-ecosystem. If you a project maintainer, you can <a href="/ecosystem/registry/adding/">add your project to the OpenTelemetry Registry</a>
+ecosystem. If you are a project maintainer, you can <a href="/ecosystem/registry/adding/">add your project to the OpenTelemetry Registry</a>
 </div>
 
 <div class="pb-4">